LinuxϵÄÊý¾ÝÀàÐÍ
ÄÚºËʹÓõĻù±¾Êý¾ÝÀàÐÍÖ÷ÒªÓУº int £º ±ê×¼µÄCÓïÑÔÕûÊýÀàÐÍ u32 £º 32λÕûÊýÀàÐÍ pid_t £º Ìض¨Äں˶ÔÏópidµÄÀàÐÍ ÔÚ²»Í¬CPUÌåϵ½á¹¹ÉÏ£¬CÓïÑÔµÄÊý¾ÝÀàÐÍËùÕ¼ÓõĿռäÊDz»Ò»ÑùµÄ¡£ÔÚx86ϵÁнṹÏ£¬Êý¾ÝÀàÐÍÕ¼ÓõÄ×Ö½ÚÊýÈçϱíËùʾ£º arch char short int long ptr long long u8 u16 u32 u64 i686 1 2 4 4 4 8 1 2 4 8 ÔÚlinuxÏ£¬ÄÚºËÖеĵØÖ·ÊÇunsigned long ÀàÐÍ£¬Ö¸ÕëµÄ´óСÓëlongÀàÐ͵ĴóСÏàͬ¡£ ÄÚºËÌṩµÄËùÓÐÊý¾ÝÀàÐÍÔÚÍ·Îļþ<asm/types.h>ÖÐÉùÃ÷£¬Õâ¸öÎļþÓÖ±»<Linux/types.h>Ëù°üº¬¡£ LinuxʹÓÃÓÐǰ׺µÄÀàÐÍÓÃÓÚ½«±äÁ¿ÏÔ¶¸øÓû§¿Õ¼ä£¬Èç__u32¡£ ÄÚºËÖкܶàÊý¾ÝÀàÐÍÊÇÓÉtypedefÉùÃ÷£¬ÕâÑù±ãÓÚÒÆÖ²¡£
Ïà¹ØÎĵµ£º
Service Discovery Protocol(SDP)ÌṩһÖÖÄÜÁ¦£¬ÈÃÓ¦ÓóÌÐòÓз½·¨·¢ÏÖÄÄÖÖ·þÎñ¿ÉÓÃÒÔ¼°ÕâÖÖ·þÎñµÄÌØÐÔ¡£
·þÎñ·¢ÏÖÐÒé(SDP»òBluetooth SDP)ÔÚÀ¶ÑÀÐÒéÕ»ÖжÔÀ¶ÑÀ»·¾³ÖеÄÓ¦ÓóÌÐòÓÐÌØÊâµÄº¬Ò⣬·¢ÏÖÄĸö·þÎñÊÇ¿ÉÓõĺÍÈ·¶¨ÕâЩ¿ÉÓ÷þÎñµÄÌØÕ÷¡£SDP¶¨ÒåÁËbluetooth client·¢ÏÖ¿ÉÓÃbluetooth server·þÎñºÍËüÃǵÄÌØÕ÷µÄ·½·¨¡£ ......
linuxÖÐÓÃshell»ñÈ¡×òÌì¡¢Ã÷Ìì»ò¶àÌìÇ°µÄÈÕÆÚ:
ÔÚLinuxÖжÔman date -d ²ÎÊý˵µÄ±È½ÏÄ£ºý,ÒÔϾÙÀý½øÒ»²½ËµÃ÷:
# -d, --date=STRING display time described by STRING, not `now’
[root@Gman root]# date -d next-day +%Y%m%d #Ã÷ÌìÈÕÆÚ
20091024
[root@Gman root]# date -d last-day +%Y%m%d #×òÌìÈÕÆÚ
20091 ......
ËäÈ»ÒÔÇ°Ò²±àÒë¹ýÄںˣ¬µ«ÊǹØÓÚÄÚºËÅäÖÃÑ¡ÏîÌرðÊÇÓйر¾»úÇý¶¯Õâ¿é»¹ÊDz»ÊìϤ£¬ÒòΪûÓÐͨ¹ýÈ·¶¨ÓÐЧµÄ;¾¶ÖªµÀµ±Ç°¹¤×÷Õý³£µÄÄÚºËÖе½µ×ʹÓÃÁËʲôÇý¶¯Ä£¿éÀ´¿ØÖÆÓ²¼þ£¬×î½ü¿´µ½Ò»±¾Ê顶Linux kernel in a netshell¡·£¬¸Ð¾õ½²µÄ»¹²»´í£¬ËùÒÔ¼Çϱʼǡ£
1.±àÒëÄں˵Ť¾ß
& ......
Òýµ¼ Linux® ϵͳµÄ¹ý³Ì°üÀ¨ºÜ¶à½×¶Î¡£²»¹ÜÄúÊÇÒýµ¼Ò»¸ö±ê×¼µÄ x86 ×ÀÃæϵͳ£¬»¹ÊÇÒýµ¼Ò»Ì¨Ç¶ÈëʽµÄ
PowerPC® »úÆ÷£¬ºÜ¶àÁ÷³Ì¶¼¾ªÈ˵ØÏàËÆ¡£±¾ÎĽ«Ì½Ë÷ Linux
µÄÒýµ¼¹ý³Ì£¬´Ó×î³õµÄÒýµ¼µ½Æô¶¯µÚÒ»¸öÓû§¿Õ¼äÓ¦ÓóÌÐò¡£ÔÚ±¾ÎĽéÉܵĹý³ÌÖУ¬Äú½«Ñ§Ï°µ½¸÷ÖÖÓëÒýµ¼ÓйصÄÖ÷Ì⣬ÀýÈçÒýµ¼¼ÓÔسÌÐò¡¢Äں˽âѹ¡¢³õʼ
RA ......
/etc/inittabÎļþµÄ×ֶμ°Æä˵Ã÷
/etc/inittabÎļþÖÐÿ¸öµÇ¼ÇÏîµÄ½á¹¹¶¼ÊÇÒ»ÑùµÄ£¬¹²·ÖΪÒÔðºÅ“£º”·Ö¸ôµÄ4¸ö×ֶΡ£¾ßÌåÈçÏ£º
identifier : run_level : action : process
ÆäÖУ¬¸÷×Ö¶ÎÒÔ¼°ÓëÆäÏà¹ØµÄ˵Ã÷ÈçÏ£º
identifier
µÇ¼ÇÏî±êʶ·û£¬×î¶àΪ4¸ö×Ö·û¡£ÓÃÓÚΩһµØ±êʶ/etc/inittabÎļþÖеÄÿһ¸öµÇ¼ÇÏ ......